Created
March 20, 2014 20:57
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| h1 = {a: 1, b: 2} | |
| h2 = h1.keep_if{|k,v| k == :a} | |
| p h1.inspect # => {a: 1} | |
| p h2.inspect # => {a: 1} |
if that's not the desired outcome, easiest fix seems to be:
h2 = h1.clone.keep_if{|k,v| k == :a}
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was thinking this was a bug. however, looking at the documentation for this method, it appears that it is intentional for this to delete keys in the hash of the original hash. Seems like by convention, it should have a "!" at the end of the method name though...